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ENERGY SAVING FEATURE If the watch receives no transmitter signal after 5 minutes, the SE200 will switch back to the previous display mode. SPECIFICATIONS Real time clock: 12/24 hour with hour / minute / second Stopwatch: 00:00:00 to 29:59:59 (hrs: min: sec) Heart rate: 30 - 240 bpm Upper limit: 80 - 240 bpm Lower limit: 30 - 220 bpm Power: Watch 1 x CR2032 3V battery Chest belt 1 x CR2032 3V battery Operating temp: -10°C to +50°C (14°F to 122°F) Storage temp: -20°C to +60°C (-4°F to 140°F) Wate